STROUDSBURG, Pa. (CBSNewYork/AP) — Four New York City men face sentencing in the death of a 19-year-old pledge during a 2013 hazing ritual in Pennsylvania.

Baruch College freshman Chun “Michael” Deng was blindfolded, forced to wear a heavy backpack and then repeatedly tackled in December 2013.

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He was knocked unconscious during the incident and police said fraternity members waited more than an hour before taking Deng to the hospital, where he died from his injuries.

A Pennsylvania coroner declared Deng’s death a homicide.

Police charged 37 people.

The four defendants to be sentenced Monday pleaded guilty to voluntary manslaughter and face jail time.

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Their fraternity, Pi Delta Psi, was convicted of involuntary manslaughter following a trial. It has been banned from Pennsylvania for 10 years and ordered to pay a fine of more than $110,000 for its role in Deng’s death.

Deng’s mother prepared a statement to be read at the sentencing. Mary Deng wrote the pain feels like “a cat clawing and scratching” at her heart.

Defense attorneys have called Deng’s death a tragedy but said their clients didn’t intend to kill him. They characterized it as a fraternity prank gone horribly awry.

Baruch College threw the fraternity chapter off campus permanently in response to the incident.

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(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)